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Diffstat (limited to 'hw/xfree86/xaa/xaaDashLine.c')
-rw-r--r--hw/xfree86/xaa/xaaDashLine.c329
1 files changed, 329 insertions, 0 deletions
diff --git a/hw/xfree86/xaa/xaaDashLine.c b/hw/xfree86/xaa/xaaDashLine.c
new file mode 100644
index 000000000..212116ae4
--- /dev/null
+++ b/hw/xfree86/xaa/xaaDashLine.c
@@ -0,0 +1,329 @@
+/* $XFree86: xc/programs/Xserver/hw/xfree86/xaa/xaaDashLine.c,v 1.5 2002/09/18 18:14:59 martin Exp $ */
+
+#include "X.h"
+#include "misc.h"
+#include "xf86.h"
+#include "xf86_ansic.h"
+#include "xf86_OSproc.h"
+
+#include "scrnintstr.h"
+#include "pixmapstr.h"
+#include "miline.h"
+#include "xf86str.h"
+#include "xaa.h"
+#include "xaalocal.h"
+
+
+void
+#ifdef POLYSEGMENT
+XAAPolySegmentDashed(
+ DrawablePtr pDrawable,
+ GCPtr pGC,
+ int nseg,
+ xSegment *pSeg
+#else
+XAAPolyLinesDashed(
+ DrawablePtr pDrawable,
+ GCPtr pGC,
+ int mode, /* Origin or Previous */
+ int npt, /* number of points */
+ DDXPointPtr pptInit
+#endif
+){
+ XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
+ XAAGCPtr pGCPriv = (XAAGCPtr) (pGC)->devPrivates[XAAGCIndex].ptr;
+ BoxPtr pboxInit = REGION_RECTS(pGC->pCompositeClip);
+ int nboxInit = REGION_NUM_RECTS(pGC->pCompositeClip);
+ unsigned int bias = miGetZeroLineBias(pDrawable->pScreen);
+ int xorg = pDrawable->x;
+ int yorg = pDrawable->y;
+ int nbox;
+ BoxPtr pbox;
+#ifndef POLYSEGMENT
+ DDXPointPtr ppt;
+#endif
+ unsigned int oc1, oc2;
+ int dmin, dmaj, e, octant;
+ int x1, x2, y1, y2, tmp, len, offset;
+ int PatternLength, PatternOffset;
+
+ if(!nboxInit)
+ return;
+
+ if (infoRec->DashedLineFlags & LINE_LIMIT_COORDS) {
+ int minValX = infoRec->DashedLineLimits.x1;
+ int maxValX = infoRec->DashedLineLimits.x2;
+ int minValY = infoRec->DashedLineLimits.y1;
+ int maxValY = infoRec->DashedLineLimits.y2;
+#ifdef POLYSEGMENT
+ int n = nseg;
+ xSegment *s = pSeg;
+
+ while (n--)
+#else
+ int n = npt;
+ int xorgtmp = xorg;
+ int yorgtmp = yorg;
+
+ ppt = pptInit;
+ x2 = ppt->x + xorgtmp;
+ y2 = ppt->y + yorgtmp;
+ while (--n)
+#endif
+ {
+#ifdef POLYSEGMENT
+ x1 = s->x1 + xorg;
+ y1 = s->y1 + yorg;
+ x2 = s->x2 + xorg;
+ y2 = s->y2 + yorg;
+ s++;
+#else
+ x1 = x2;
+ y1 = y2;
+ ++ppt;
+ if (mode == CoordModePrevious) {
+ xorgtmp = x1;
+ yorgtmp = y1;
+ }
+ x2 = ppt->x + xorgtmp;
+ y2 = ppt->y + yorgtmp;
+#endif
+ if (x1 > maxValX || x1 < minValX ||
+ x2 > maxValX || x2 < minValX ||
+ y1 > maxValY || y1 < minValY ||
+ y2 > maxValY || y2 < minValY) {
+#ifdef POLYSEGMENT
+ XAAFallbackOps.PolySegment(pDrawable, pGC, nseg, pSeg);
+#else
+ XAAFallbackOps.Polylines(pDrawable, pGC, mode, npt, pptInit);
+#endif
+ return;
+ }
+ }
+ }
+
+ PatternLength = pGCPriv->DashLength;
+ PatternOffset = pGC->dashOffset % PatternLength;
+
+ (*infoRec->SetupForDashedLine)(infoRec->pScrn, pGC->fgPixel,
+ (pGC->lineStyle == LineDoubleDash) ? pGC->bgPixel : -1,
+ pGC->alu, pGC->planemask, PatternLength, pGCPriv->DashPattern);
+
+
+#ifdef POLYSEGMENT
+ while (nseg--)
+#else
+ ppt = pptInit;
+ x2 = ppt->x + xorg;
+ y2 = ppt->y + yorg;
+ while(--npt)
+#endif
+ {
+ nbox = nboxInit;
+ pbox = pboxInit;
+
+#ifdef POLYSEGMENT
+ x1 = pSeg->x1 + xorg;
+ y1 = pSeg->y1 + yorg;
+ x2 = pSeg->x2 + xorg;
+ y2 = pSeg->y2 + yorg;
+ pSeg++;
+#else
+ x1 = x2;
+ y1 = y2;
+ ++ppt;
+ if (mode == CoordModePrevious) {
+ xorg = x1;
+ yorg = y1;
+ }
+ x2 = ppt->x + xorg;
+ y2 = ppt->y + yorg;
+#endif
+
+
+ if (infoRec->SubsequentDashedBresenhamLine) {
+ if((dmaj = x2 - x1) < 0) {
+ dmaj = -dmaj;
+ octant = XDECREASING;
+ } else octant = 0;
+
+ if((dmin = y2 - y1) < 0) {
+ dmin = -dmin;
+ octant |= YDECREASING;
+ }
+
+ if(dmin >= dmaj){
+ tmp = dmin; dmin = dmaj; dmaj = tmp;
+ octant |= YMAJOR;
+ }
+
+ e = -dmaj - ((bias >> octant) & 1);
+ len = dmaj;
+ dmin <<= 1;
+ dmaj <<= 1;
+ } else { /* Muffle compiler */
+ dmin = dmaj = e = octant = len = 0;
+ }
+
+ while(nbox--) {
+ oc1 = oc2 = 0;
+ OUTCODES(oc1, x1, y1, pbox);
+ OUTCODES(oc2, x2, y2, pbox);
+ if (!(oc1 | oc2)) { /* uncliped */
+ if(infoRec->SubsequentDashedTwoPointLine) {
+ (*infoRec->SubsequentDashedTwoPointLine)(
+ infoRec->pScrn, x1, y1, x2, y2,
+#ifdef POLYSEGMENT
+ (pGC->capStyle != CapNotLast) ? 0 :
+#endif
+ OMIT_LAST, PatternOffset);
+ } else {
+ (*infoRec->SubsequentDashedBresenhamLine)(
+ infoRec->pScrn, x1, y1, dmaj, dmin, e,
+#ifdef POLYSEGMENT
+ (pGC->capStyle != CapNotLast) ? (len+1) :
+#endif
+ len, octant, PatternOffset);
+ }
+ break;
+ } else if (oc1 & oc2) { /* completely clipped */
+ pbox++;
+ } else if (infoRec->ClippingFlags & HARDWARE_CLIP_DASHED_LINE) {
+ (*infoRec->SetClippingRectangle)(infoRec->pScrn,
+ pbox->x1, pbox->y1, pbox->x2 - 1, pbox->y2 - 1);
+
+ if(infoRec->SubsequentDashedBresenhamLine) {
+ (*infoRec->SubsequentDashedBresenhamLine)(
+ infoRec->pScrn, x1, y1, dmaj, dmin, e,
+#ifdef POLYSEGMENT
+ (pGC->capStyle != CapNotLast) ? (len+1) :
+#endif
+ len, octant, PatternOffset);
+ } else {
+ (*infoRec->SubsequentDashedTwoPointLine)(
+ infoRec->pScrn, x1, y1, x2, y2,
+#ifdef POLYSEGMENT
+ (pGC->capStyle != CapNotLast) ? 0 :
+#endif
+ OMIT_LAST, PatternOffset
+ );
+ }
+ (*infoRec->DisableClipping)(infoRec->pScrn);
+ pbox++;
+ } else {
+ int new_x1 = x1, new_y1 = y1, new_x2 = x2, new_y2 = y2;
+ int clip1 = 0, clip2 = 0;
+ int err, adx, ady;
+
+ if(octant & YMAJOR) {
+ ady = dmaj >> 1;
+ adx = dmin >> 1;
+ } else {
+ ady = dmin >> 1;
+ adx = dmaj >> 1;
+ }
+
+ if (miZeroClipLine(pbox->x1, pbox->y1,
+ pbox->x2 - 1, pbox->y2 - 1,
+ &new_x1, &new_y1, &new_x2, &new_y2,
+ adx, ady, &clip1, &clip2,
+ octant, bias, oc1, oc2) == -1)
+ {
+ pbox++;
+ continue;
+ }
+
+ if (octant & YMAJOR)
+ len = abs(new_y2 - new_y1);
+ else
+ len = abs(new_x2 - new_x1);
+#ifdef POLYSEGMENT
+ if (clip2 != 0 || pGC->capStyle != CapNotLast)
+ len++;
+#else
+ len += (clip2 != 0);
+#endif
+ if (len) {
+ int abserr, clipdx, clipdy;
+ /* unwind bresenham error term to first point */
+ if (clip1) {
+ clipdx = abs(new_x1 - x1);
+ clipdy = abs(new_y1 - y1);
+
+ if (octant & YMAJOR)
+ err = e + clipdy*dmin - clipdx*dmaj;
+ else
+ err = e + clipdx*dmin - clipdy*dmaj;
+ } else
+ err = e;
+
+#define range infoRec->DashedBresenhamLineErrorTermBits
+ abserr = abs(err);
+ while((abserr & range) ||
+ (dmaj & range) ||
+ (dmin & range)) {
+ dmin >>= 1;
+ dmaj >>= 1;
+ abserr >>= 1;
+ err /= 2;
+ }
+
+ if(octant & YMAJOR)
+ offset = abs(new_y1 - y1);
+ else
+ offset = abs(new_x1 - x1);
+
+ offset += PatternOffset;
+ offset %= PatternLength;
+
+ (*infoRec->SubsequentDashedBresenhamLine)(
+ infoRec->pScrn, new_x1, new_y1,
+ dmaj, dmin, err, len, octant, offset);
+ }
+ pbox++;
+ }
+ } /* while (nbox--) */
+#ifndef POLYSEGMENT
+ len = abs(y2 - y1);
+ tmp = abs(x2 - x1);
+ PatternOffset += (len > tmp) ? len : tmp;
+ PatternOffset %= PatternLength;
+#endif
+ } /* while (nline--) */
+
+#ifndef POLYSEGMENT
+ /* paint the last point if the end style isn't CapNotLast.
+ (Assume that a projecting, butt, or round cap that is one
+ pixel wide is the same as the single pixel of the endpoint.)
+ */
+
+ if ((pGC->capStyle != CapNotLast) &&
+ ((ppt->x + xorg != pptInit->x + pDrawable->x) ||
+ (ppt->y + yorg != pptInit->y + pDrawable->y) ||
+ (ppt == pptInit + 1)))
+ {
+ nbox = nboxInit;
+ pbox = pboxInit;
+ while (nbox--) {
+ if ((x2 >= pbox->x1) && (y2 >= pbox->y1) &&
+ (x2 < pbox->x2) && (y2 < pbox->y2))
+ {
+ if(infoRec->SubsequentDashedTwoPointLine) {
+ (*infoRec->SubsequentDashedTwoPointLine)(
+ infoRec->pScrn, x2, y2, x2, y2, 0,
+ PatternOffset);
+ } else {
+ (*infoRec->SubsequentDashedBresenhamLine)(
+ infoRec->pScrn, x2, y2, 2, 0, -1,
+ 1, 0, PatternOffset);
+ }
+ break;
+ } else
+ pbox++;
+ }
+ }
+#endif
+
+ SET_SYNC_FLAG(infoRec);
+}
+
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